Dr. Wilson: I was telling a 39-year-old woman that she has breast cancer.House: No, you weren't.Dr. Wilson: How do you know?House: Because if you were, you'd need to see the pain in her eyes so she could see the concern in yours.

House: Sorry, I'm busy. Tell me you have a case. You know, even if you don't.Dr. Chase: We have a case.House: Sounds interesting. I'll take it. I owe you one. Now tell me you don't have a case.Dr. Chase: I really do have a case.House: We're even.